Results 11 to 20 of about 1,075,830 (357)

Tryptophan Fluorescence Quenching Assays for Measuring Protein-ligand Binding Affinities: Principles and a Practical Guide

Bio-Protocol, 2019
Tryptophan fluorescence quenching is a type of fluorescence spectroscopy used for binding assays. The assay relies on the ability to quench the intrinsic fluorescence of tryptophan residues within a protein that results from changes in the local ...
Anthony Yammine, Jinlong Gao, Ann Kwan
doaj   +2 more sources

Dual "Static and Dynamic" Fluorescence Quenching Mechanisms Based Detection of TNT via a Cationic Conjugated Polymer. [PDF]

ACS Meas Sci Au, 2022
A rare combination of dual static and dynamic fluorescence quenching mechanisms is reported, while sensing the nitroexplosive trinitrotoluene (TNT) in water by a cationic conjugated copolymer PFPy.
Tanwar AS, Parui R, Garai R, Chanu MA, Iyer PK.   +4 more
europepmc   +2 more sources

Development of Fluorescent Aptasensors Based on G-Quadruplex Quenching Ability for Ochratoxin A and Potassium Ions Detection

Biosensors, 2022
G-quadruplexes have received significant attention in aptasensing due to their structural polymorphisms and unique binding properties. In this work, we exploited the fluorescence-quenching properties of G-quadruplex to develop a simple, fast, and ...
Cheng Yang, Xiaolin Chu, Li Zeng, Amina Rhouati, Fathimath Abbas, Shengnan Cui, Daiqin Lin   +6 more
doaj   +1 more source

Spectroscopic and Structural Analysis of Cu²⁺-Induced Fluorescence Quenching of ZsYellow

Biosensors, 2020
Fluorescent proteins exhibit fluorescence quenching by specific transition metals, suggesting their potential as fluorescent protein-based metal biosensors. Each fluorescent protein exhibits unique spectroscopic properties and mechanisms for fluorescence
In Jung Kim, Yongbin Xu, Ki Hyun Nam
doaj   +1 more source

Cobalt Detection Using Fluorescent Dye Layers

Engineering Proceedings, 2022
In this paper, we report the preliminary results regarding the use of fluorescent dye calcein (C30H26N2O13) as a sensor for the detection of cobalt levels in aqueous solutions.
Fernando Arturo Armenta-Serna, Yadira Aracely Fuentes-Rubio, René Fernando Domínguez-Cruz, Luis Antonio García-Garza, Oscar Baldovino-Pantaleón, Carlos Ruiz-Zamarreño   +5 more
doaj   +1 more source

Quenching Efficiency of Quantum Dots Conjugated to Lipid Bilayers on Graphene Oxide Evaluated by Fluorescence Single Particle Tracking

Applied Sciences, 2022
A single particle observation of quantum dots (QDs) was performed on lipid bilayers formed on graphene oxide (GO). The long-range fluorescence quenching of GO has been applied to biosensing for various biomolecules.
Yoshiaki Okamoto, Seiji Iwasa, Ryugo Tero   +2 more
doaj   +1 more source

Fluorescence Detection Characteristic of Heavy-metal Chromium Ions in Water by Photoluminescent Tungsten-oxide Cluster Material

Shipin gongye ke-ji, 2022
In this work, using Eu3+ embedded tungsten-oxygen cluster (compound 1) as the fluorescent probe material, the rapid and sensitive fluorescence detection of heavy metal Cr3+ ions in aqueous solution by compound 1 has been systematically studied.
Zhenwei WANG, Xiliang CHEN, Xiaobing HU, Changyuan LU   +3 more
doaj   +1 more source

Determination of epristeride by its quenching effect on the fluorescence of L-tryptophan

Journal of Pharmaceutical Analysis, 2013
A rapid, novel spectrofluorimetric method to determine epristeride (EP) in biological fluids and a pharmaceutical formulation was developed, based on the fact that fluorescence intensity of l-tryptophan could be quenched by EP in the medium of pH=9.0 ...
Ai-Qin Gong, Xia-Shi Zhu
doaj   +1 more source

Promoting near‐infrared II fluorescence efficiency by blocking long‐range energy migration

Aggregate, 2023
Generally, long wavelength absorbed near‐infrared II (NIR‐II) dyes have a low fluorescence efficiency in aggregate states for aggregate‐caused quenching effect, simultaneously enhancing efficiency and extending absorption is a challenging issue for NIR ...
Changjin Ou, Lei An, Ziqi Zhao, Fan Gao, Liangyu Zheng, Chao Xu, Kang Zhang, Jinjun Shao, Linghai Xie, Xiaochen Dong   +9 more
doaj   +1 more source

Empirical equation for the correction of fluorescence quenching of proteinaceous substance by Suwannee river natural organic matter

Water Practice and Technology, 2021
Fluorescence quenching of proteinaceous substances by natural organic matter is a well-known phenomenon, but there are no known methods for correcting it.
Kornravee Saipetch, Rajendra Khanal, Chihiro Yoshimura   +2 more
doaj   +1 more source